My private property trumps your freedom of speech

Last night as I was leaving the library on Northeastern's campus I noticed a large chalk drawing on the granite landing outside. Now, chalking isn't unusual on campus. In fact, it's usually one of the cheapest and easiest ways for campus groups to advertise an event. This chalking was different though.

In large letters it read OBAMA HILLARY with the communist symbol in the middle.
I almost took a picture because I thought it was odd and interesting. But since it was almost 11:30 and cold, I wanted to get to the train as fast as possible.

I'm mad now that I didn't take a picture. I arrived on campus this morning at about 10 am to find several Northeastern maintenance employees washing the bricks in Krentzman quad. There was a puddle of blue chalk forming below the hose.

My immediate assumption was confirmed later when I got to the library to find a puddle in place of the chalking last night.

So my question is why did Northeastern find whatever the chalking meant to be so offensive that it needed to be washed away before most kids crossed campus this morning. What did the other chalkings say besides the one outside the library? If you know, please leave a comment.

12:27pm Update: Apparently chalking was done by "freshmen college republicans." It is a priviledge on campus, which makes total sense since it's private property. Northeastern retains the right to get rid of anything they deem not okay, especially if you didn't get permission. NEU's publicity rules.